3 replies to this topic

[Milnesium]

Hi,

 

I am trying to write an interface between Python 3.7 and Hysys case. I managed to establish a connection between them, connect Hysys as COM.Object.

 

This gave me the ability to modify the data of streams using syntax like:

 

'HyCase.Flowsheet.MaterialStreams.Item(1).Temperature.SetValue(20, "C")'

 

In this case everything work fine, but wen im try to change, for example, condenser pressure of column K-1 using syntax:

 

'HyCase.Flowsheet.Operations.Item("K-1").ColumnFlowsheet.SeparationColumnStages.Item("Condenser").SeparationStage.Pressure.SetValue(2, "kPa")'

 

it gives me error "70 Premission denied". But i can change that value handly in column specifications directly in Hysys, also

 

'HyCase.Flowsheet.Operations.Item("K-1").ColumnFlowsheet.SeparationColumnStages.Item("Condenser").SeparationStage.Pressure.CanModify'

 

returns me "True" value.

 

I have tried doing all the same using VBA and the picture was the same. I can modify one values but can't modify the others although they "CanModify" attribute is "True". Maybe i using wrong syntax or something? I have no idea how can i solve this error.

 

Thanks.

 

P.S. Sorry for my English

[Bobby Strain]

You will probably find that VBA and VB.Net work much better with HYSYS.

 

Bobby

[lnbsak]

I don't have specific answer to your problem. But we were able to automate HYSYS and ASPEN PLUS following the website. Al input value from variable explorer can be manipulated.

[Milnesium]

Thanks for your advices, finally i can solve this problem by using a little bit different syntax:

 

' HyCase.Flowsheet.Operations.Item("K-1").ColumnFlowsheet.Pressures.Variables[0].SetValue(2, 'kg/cm2_g') '

 

In theory I was accessing the same parameter, and i have no idea why i can change it by this method, but can't by another.